350. The abstract.

The abstract contained in an application for a patent1 must commence with a title for the invention2 and must contain a concise summary of the matter contained in the specification3. That summary must include:


    (1)     an indication of the technical field to which the invention belongs4;


    (2)     a technical explanation of the invention5; and


    (3)     the principal use of the invention6.

Where the specification contains more than one drawing or photograph, the abstract must include an indication of the drawing or photograph which should accompany the abstract when it is published7. Where it appears to the comptroller8 that a drawing